Thread: A bit of 7mm advice

I built a 7-300 and brass is easy to size. Went with std shoulder, just a straight neck down. I love it.

Originally Posted by Chicken

I built a 7-300 and brass is easy to size. Went with std shoulder, just a straight neck down. I love it.

Who has the reamer? Who chambered it?

Originally Posted by Echo

Who has the reamer? Who chambered it?

I do, and me. Sorry 7-300 win mag

Originally Posted by Chicken

I built a 7-300 and brass is easy to size. Went with std shoulder, just a straight neck down. I love it.

7-300 What?

Originally Posted by camo wsm

7-300 What?

I'm assuming its a 7mm/300 win mag

Nathan Foster has put a bit of work into it importing Lee dies and has a reamer

His model has an improved shoulder which needs fire forming

He also left the neck long with his chamber reamer to allow for case growth....but reduced the chance of that with the improved shoulder angle...never could understand that

Its about the perfect maximum case capacity for a 7mm bordering going overbore